KR100674712B1 - Data scan system and the method using ddr - Google Patents

Abstract

A data scan system and method using a DDR(Double Data Rate) are provided to process data at a high speed by storing one of two data, which are stored or output during one clock, in an input buffer or an output buffer. An input unit(10) receives data. First and second DDR memories(57,58) store the data by using a page having a COL address to be increased in a horizontal direction. A DDR controller(54) performs a control operation for storing the data in the first or second DDR memory, a control operation for reading the stored data, and a control operation for simultaneously reading the data of the same row from two or more row data of the page. An output buffer(56) is used for simultaneously storing the read data. An output unit(80) outputs the read data and the rest data of the output buffer.

Description

DATA SCAN SYSTEM AND THE METHOD USING DDR

1A illustrates a DRAM address structure

1B is a view showing the structure of a page composed of several cells

2 is a diagram illustrating a data access method of DDR when using burst mode;

3 is a convex view of a scanning system according to the present invention;

4 is a diagram illustrating a page in which a COL address increases in a horizontal direction as an embodiment of the present invention.

FIG. 5 is a diagram for explaining reading data using a page of the structure shown in FIG. 4 with data having a 1920 * 1080 resolution. FIG.

6 is a more detailed block diagram of a scan system according to an embodiment of the present invention.

7 is a diagram illustrating a page in which a COL address increases in a vertical direction as another embodiment of the present invention.

FIG. 8 is a diagram for describing writing data using a page of the structure shown in FIG. 6 with data having a 1920 * 1080 resolution; FIG.

9 is a more detailed block diagram of a scan system according to another embodiment of the present invention.

<Description of Major Symbols in Drawing>

Pages: 100-1, 100-2, 100-3, ..., 100-N

500: frame 50: input unit

50: processor 52: input buffer

54: DDR controller 56: output buffer

57: first DDR memory 58: second DDR memory

80: output unit

The present invention relates to a system and method for scanning data using DDR, and again by storing the data of one of the two data stored or output for one clock including the input buffer or output buffer in the input buffer or output buffer again The present invention relates to a system and method for scanning data using DDR that can perform data processing at high speed without access to data.

In general, in a display device such as a CRT or LCD, an input direction and an output direction of an image signal are the same, but in a display device using a spatial optical modulator (SOM) or a grating light valve (GLV), the image data is stored in a horizontal direction. Since the output in the vertical direction, the input direction and output direction of the image data is different.

The scan system and method of data using DDR of the present invention is applied to a display device using SOM or GLV. That is, the data is stored in the horizontal direction, and the data is simultaneously displayed in the vertical direction. In this case, in order to output data input in the horizontal direction in the vertical direction, data corresponding to one frame should be stored and output while data of the next frame is input. Therefore, the memory used in such a display device should be capable of high-speed data processing, which processes a large amount of data in a short time.

In general, as a memory capable of storing a large amount of data, Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate (DDR) -SDRAM, DDR2-SDRAM, Rambus-DRAM (RDRAM), and the like, which are examples of DRAM, are used. SDRAM is used as a data storage means in the display device using the.

FIG. 1A is a diagram illustrating a DRAM address structure, and FIG. 1B is a diagram illustrating a structure of a page (hereinafter, referred to as a 'page') composed of several cells.

The display screen constitutes one frame 500, and as illustrated in FIG. 1A, one frame is divided into a plurality of pages 100-1, 100-2, 100-3,... Each page 100-1, 100-2, ..., 100-n is assigned a row address. In DRAM, through a LOW address mapping, it is possible to activate a desired page among a plurality of pages 100-1, 100-2,..., 100-n and to access a corresponding memory.

In addition, as shown in FIG. 1B, a plurality of memory cells are included in one page 100-1, and each memory cell has a COL address. Page 100 in FIG. 1B has a COL address increasing in the horizontal direction and has 16 COL addresses of 0-15.

On the other hand, when accessing a memory cell on the same page for reading and writing data, relatively fast access is possible, but when accessing a cell on another page, a new ROW address must be specified. That is, relatively fast access is possible between memory cells included in page 100-1, but when a memory cell included in page 100-2 is accessed from page 100-1, a new row address corresponding to page 100-2 is newly designated. shall. In this process, a delay due to a page miss occurs. This delay causes a decrease in memory access speed, and it is necessary to reduce the number of page misses in order to enable high-speed data processing.

On the other hand, in an attempt to reduce the number of page misses and enable high-speed data processing, a technique using burst mode and a memory bank is disclosed in US Patent Application Publication No. 2002/0109699. According to the technique disclosed in the above publication, the page miss is reduced by activating the memory page of the second memory bank during the burst access of the memory page in the first memory bank. In addition, in the same manner, while burst accessing the page of the second memory bank, the page of the first memory bank is activated.

In addition, an additional memory bank may be used in addition to the two memory banks. For example, a memory device having four memory banks may be used. For example, the first page corresponds to the first memory page of the first memory bank, and the second page corresponds to the second memory bank. To a first memory page of a second memory bank, a third page to a first memory page of a third memory bank, a fourth page to a first memory page of a fourth memory bank, and a fifth page to a first memory page It is stored in the second memory page. In this pattern, the entire page of a frame is stored in another memory page of the first to fourth memory banks.

The first page having a different row address, the first memory bank in which the second page is stored, and the second memory bank are simultaneously activated to prevent page misses occurring when the first page accesses the second page. In other words, this technique attempts to realize high-speed data processing by reducing delay by utilizing the fact that even pages having different ROW addresses can be activated at the same time when stored memory banks are different.

However, as described in the above-described burst mode and memory bank technology, when a display device using SOM or GLV uses DDR such as DDR-SDRAM or DDR2-SDRAM (hereinafter referred to as 'DDR memory') as a storage means. There is a problem that can not exhibit the DDR inherent characteristics.

2 is a diagram illustrating a data access method of a DDR memory when a burst mode is used.

As shown in FIG. 2, the DDR memory is alternately given a 'READ' command and a 'NOP' command during one clock cycle. However, since DDR memory uses burst mode, it is possible to read the data of QA2 in the same period by increasing the COL address even if only a 'READ' command is given to QA1 for one clock period. In this way, the data of QA0 and QA1 are simultaneously read during one clock period.

However, even if it is possible to read the data of QA0 and QA1 at the same time, the data of QA1 is not needed at the time of approaching to read the data of QA0, so the data is not used and discarded. Then, when the data of QA1 is to be obtained after that, access is made to read the data of QA1 again. That is, if the conventional burst mode and memory bank technology are applied to DDR as it is, it is possible to read the data of QA0 and QA1 simultaneously for one clock, but the data of QA1 is discarded and approached to read QA1 again at the next clock. shall.

As described above, in the conventional technology, unlike the SDRAM, there is a problem in that the characteristics of the DDR memory in which two data accesses are performed at one clock are not used for high-speed data processing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a data scanning system and method using DDR, including one of two data stored or outputted during one clock including an input buffer or an output buffer. The present invention provides a data scanning system and method using DDR that can perform data processing at high speed without access to obtain the same data by storing data in an input buffer or an output buffer.

System for scanning data using DDR according to an embodiment of the present invention for achieving the above object, the input unit for receiving the data; First and second DDR memories for storing the data by using a page whose COL address increases in a horizontal direction; When controlling to store the data in the first or second DDR memory and reading the data stored from the first or second DDR memory, and when reading the stored data from the first or second DDR memory, A DDR controller which controls to simultaneously read data corresponding to the same row from at least two columns of data of the page; An output buffer for storing the data read simultaneously; And an output unit configured to output the data read by the DDR controller and data of the remaining rows stored in the output buffer.

Here, when the data is stored in the first or second DDR memory by the DDR controller, a burst mode that is continuously increased is used, wherein the data is stored in the first or second DDR by the DDR controller When reading from the memory, the burst mode is used.

The DDR controller may control the output unit to output data of the remaining columns after outputting the data of the first column, and the output buffer may include one or more columns.

In addition, a data scanning system using DDR according to another embodiment of the present invention, the input unit for receiving the data; An input buffer for storing the received data; First and second DDR memories storing the data by using a page whose COL address increases in a vertical direction; Control to store the data in the first or second DDR memory and control to read the stored data from the first or second DDR memory, and when storing the data in the first or second DDR memory, A DDR controller which controls to simultaneously store data corresponding to the same column in the data of the row stored in the input buffer and the data of the row currently input to the input unit; And an output unit for outputting the data read by the DDR controller.

When the data is read from the first or second DDR memory by the DDR controller, a burst mode that is continuously increased is used, and when the data is stored in the first or second DDR memory by the DDR controller. , Burst mode is used.

The DDR controller may control to store the data of the remaining rows except the data of the last row in the first or second memory before the data of the last row is stored. May contain more than one row.

Preferably, the arrangement of the COL address of the page is dependent on a burst mode preset in the DDR memory, wherein the number of data bits of memory cells of the first or second DDR memory is one pixel data of the data. It is characterized by greater than or equal to.

The DDR controller may control to read the data from another DDR memory while controlling the data to be stored in one of the first DDR memory and the second DDR memory. The data scanning system using the DDR is characterized in that it is applied to a display device that is different from the input direction and output direction of the data.

On the other hand, the scan method of data using DDR according to an embodiment of the present invention, the step of receiving data; Storing the data in a first or second DDR memory using a page whose COL address increases in a horizontal direction; The data stored in the first or second DDR memory is read using the page, and data corresponding to the same row in at least two columns of data of the page of the data stored in the first or second DDR memory is simultaneously displayed. Reading; Storing the read data simultaneously in an output buffer; And outputting the data.

The storing of the data in the first or second DDR memory may be performed using a burst mode that continuously increases, and the reading of the data stored in the first or second DDR memory uses a burst mode. Characterized in that. The data of the remaining columns may be output after the data of the first column is output.

According to another embodiment of the present invention, a method of scanning data using DDR includes receiving data; Storing the input data in an input buffer; The data is stored in the first or second DDR memory using a page whose COL address increases in the vertical direction, and simultaneously stores data corresponding to the same column in the data of the row stored in the input buffer and the data of the currently received row. Doing; Reading the data stored in the first or second DDR memory using the page; Outputting the data.

The reading of the data stored in the first or second DDR memory may include using a burst mode that is continuously increasing, and the storing of the data in the first or second DDR memory may include a burst mode. It characterized in that to use. The data of the remaining rows is stored in the first or second DDR memory before the data of the last row is stored.

Preferably, the arrangement of the COL address of the page is dependent on a burst mode preset in the DDR memory, wherein the number of data bits of memory cells of the first or second DDR memory is one pixel data of the data. And greater than or equal to, wherein storing the data in the first or second DDR memory and reading the data stored in the first or second DDR memory are performed simultaneously.

In addition, the scanning method using the DDR is characterized in that it is applied to a display device that is different from the input direction and output direction of the data.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. At this time, the same reference numerals are applied to the same configuration as the case of the present invention among the reference numerals described in FIGS. 1 and 2 as the prior art.

3 is a block diagram of a data scanning system using DDR that is applied to a display device that has different input and output directions of data.

As shown in FIG. 3, the scan system according to the present invention includes an input unit 10, a processing unit 50, and an output unit 80.

The input unit 10 provides the processing unit 50 with a frame of data consisting of pixels. The processor 50 stores the frame received from the input unit 10 using a page (corresponding to 'write'), reads the stored data again (corresponds to 'read'), and provides it to the output unit 80. That is, the processing unit 50 stores data and reads the stored data again, and the input and output directions of the data at the time of storing and reading are different from each other.

Hereinafter, in the address arrangement of the pages used in the processing unit 50, the case where the COL address increases in the horizontal direction and the case where the COL address increases in the vertical direction, respectively, will be described. An embodiment will be described.

Example  One

4 is a page used in the processing unit 50 and illustrates a case where the COL address increases in the horizontal direction.

As shown in FIG. 4, the page 100-1 has an 8 * 8 structure, and the COL address is increased by one in the horizontal direction. Since the page 100-1 shown in FIG. 4 is arranged to increase the COL address in the horizontal direction, the continuous burst mode is used when storing data input in the horizontal direction.

When the burst mode is used, input data may be stored in a memory cell in an order of increasing COL address in one page 100-1 without a separate command from a user. When the burst mode with the length of burst mode 8 is used for the page 100-1 shown in Fig. 4, the COL addresses 0, 1, 2, 3, 4, 5, 6, and 7 are separated from the user. Data input to a memory cell can be stored without a command.

After storing data in the first ROW 102 of the first page 100-1 shown in FIG. 4, another page 100-2 having a different ROW address is accessed to access the first page 100-2. 1 Store data in ROW as well. In this manner, data of the first frame is stored in order in the first ROW of all pages 100 -N using the burst mode. When the first row of all the pages 100 -N is finished, the data is stored in the second row of all the pages 100 -N. In this way, the data of the first frame is stored using the page 100-N.

In addition, after storing all the data of the first frame, the data of the second frame is stored in the same manner. While storing the data of the second frame, the data of the previously stored first frame are output in the vertical direction. That is, data is output in the order of COL addresses 0, 8, 16, 24, 32, 40, 48 and 56.

When outputting data, using the burst mode having a length of 2, the data of the COL address 0 and the data of the COL address 1 are simultaneously read in one clock without a separate command from the user. Referring to the page structure of FIG. 4, the data of the COL addresses 0, 1, 8 and 9, 16 and 17, 24 and 25, 32 and 33, 40 and 41, 48 and 49, 56 and 57 are in order. Is read. That is, the data of the second column 114 is read simultaneously while the data of the first column 112 is read.

On the other hand, in the present embodiment, the data of the second column 114 is stored in the buffer. Therefore, it is possible to store the data of the second column 114 which is read together while reading the data of the first column 112 without discarding it, thereby eliminating the process of reading the data of the second column 114 again. Can be. The data of the first column 112 among the data of the first column 112 and the data of the second column 114 which are read at the same time are output, and then the data of the second column 114 is output from the buffer.

While the data of the first column 112 and the second column 114 are output, the data of the third column 116 and the fourth column 118 are read in the same manner. The data of the third column 116 is output, and the data of the fourth column 118 is stored in a buffer. This process is repeated to read the last column of data in the vertical direction.

FIG. 5 is a diagram for explaining reading data using the page 100 having the structure shown in FIG. 4 with data having a 1920 * 1080 resolution.

As shown in Fig. 5, one frame has a plurality of pages. Since one page has a structure of 8 * 8, in order to process data having a resolution of 1920 * 1080, each page has 1920/8, 1080/8, that is, 240 pages and 135 pages in the horizontal and column directions, respectively.

The order of reading the memory cells stored in the DDR memory is indicated on the page shown in FIG. The data corresponding to the first column 112 and the second column 114 of the first page 100-1 are sequentially read out, and the first column 112 and the second of the first page 100-1 are read together. When reading of the data in column 114 is complete, the first column 122 of the second page 100-2, the data of the second column 124, the first column of the third page, the data of the second column Read. After reading the data of the first column 192 and the second column 194 of the 135 th page 100-135 in this manner, the process returns to the first page 100-1 and returns to the third column 116. Read the data in the fourth column 118. Similarly, the data of the third column 196 and the fourth column 198 of the 135 th page 100-135 are read. Referring to FIG. 5, the order of reading an image of 1920 * 1080 resolution using the page illustrated in FIG. 4 may be described.

Figure 6 shows a block diagram of a more detailed scan system according to an embodiment of the present invention.

As shown in FIG. 6, the scan system according to the present invention includes an input unit 10, a DDR controller 54, an output buffer 56, a first DDR memory 57, and a second DDR memory 58.

Data is input to the input unit 10, the input unit 10 is connected to the DDR controller 54, the input data is sent to the DDR controller 54. In addition, the DDR controller 54 is connected to the first DDR memory 57 and the second DDR memory 58, and sends the input data to the first DDR memory 57 or the second DDR memory 58.

At this time, the first DDR memory 57 and the second DDR memory 58 are independent memory means, respectively, while the other DDR memory while data is stored in one of the first and second DDR memory (57, 58) Data is read from. That is, during the clock of the same period, it is possible to store data in the first DDR memory and to read data from the second DDR memory.

Specifically, the first frame of the input data is stored in the first DDR memory 57. Then, a second frame of data is stored in the second DDR memory 58. While the second frame of data is stored in the second DDR memory 58, the first frame stored in the first DDR memory 57 is read from the first DDR memory 57. In this manner, while the second frame is stored, the data of the first frame is read, and in this way, the first DDR memory 57 and the second DDR memory 58 alternately repeat read / write operations for each frame. Done.

When processing a frame of data using a page having the structure of FIG. 4, first, the DDR controller 54 stores the first frame in the first DDR memory 57. At this time, the process of storing the first frame in the first frame is arranged so that the COL address is increased in the horizontal direction in the page 100 -N shown in FIG. 4. Store in memory cells in increasing order. In this way, the first frame can all be stored using burst mode.

When the first frame is all stored in the first DDR memory 57, the DDR controller 54 stores the data of the second frame in the second DDR memory 58. At this time, the first frame stored in the first DDR memory 57 is output in the vertical direction. The DDR controller 54 simultaneously reads data stored in the first row 112 and the second row 114 of the first frame from the first DDR memory 57, and outputs the data of the first row 112. The data in the second column 114 is stored in the output buffer 56. As a result, the process of rereading the data in the second column 114 from the first DDR memory 57 can be omitted, and the data in the third column 116 can be read.

That is, while storing the second frame in the second DDR memory 58, the data in the first column 112 and the second column 114 of the first DDR memory 57 is read, and the first column 112 is read. Is output, and the data of the second column 114 is stored in the output buffer 56. When the output of the data of the first column 112 is finished, the DDR controller 54 outputs the data of the second column 114 from the output buffer 56. In this way, data output of the entire column of the first frame is performed.

Example  2

7 shows a page used in the processing unit 50 as another embodiment of the present invention. Unlike the first embodiment described above, in the second embodiment, a page in which the COL address increases in the vertical direction is used.

As shown in FIG. 7, the page 200-1 has an 8 * 8 structure, and the COL address is increased in the vertical direction. Since the page 200-1 shown in FIG. 7 is arranged to increase the COL address in the vertical direction, the continuous burst mode in the horizontal direction may not be used, and the continuous burst mode in the vertical direction may be used.

When data is input, the data input direction is horizontal, so data is read in the horizontal direction. That is, the first row of data is input. The data of the first row read is stored in the buffer, and then, when the second row of data is input, the data of the first row is stored in the page 200-1 of the structure of FIG. In this case, using the burst mode with a burst length of 2, storing data in a memory cell at COL address 0 automatically while storing data in a memory cell at COL address 0 without a separate command from the user, simultaneously storing data in the memory cell at COL address 1 It is possible.

Therefore, the first row of data and the data of the second row are simultaneously stored in the first row 202 and the second row 204 of the page 200-1. That is, data is simultaneously stored in memory cells of DDR memories at COL addresses 0 and 1, 8 and 9, 16 and 17, 24 and 25, 32 and 33, 40 and 41, 49 and 50, 56 and 57, respectively. In this way, data is continuously stored in two memory cells of the same column to store all data of one frame.

FIG. 8 is a diagram for explaining writing data using a page of the structure shown in FIG. 64 with data having a 1920 * 1080 resolution.

As shown in Fig. 8, one frame has a plurality of pages. Since one page has a structure of 8 * 8, in order to process data having a resolution of 1920 * 1080, each page has 1920/8, 1080/8, that is, 240 pages and 135 pages in the horizontal and column directions, respectively.

The order of storing data in the memory cells of the DDR memory is indicated on the page shown in FIG. Data corresponding to the first row 202 and the second row 204 of the first page 200-1 are sequentially stored together, and the first row 202 and the second of the first page 200-1 are stored together. Once the data has been stored in row 204, the first row 212 of the second page 200-2, the data of the second row 214, the first row of the third page, and the second row Save the data. After reading the data of the first row 292 and the second row 294 of the 240th page 200-240 in this manner, the control returns to the first page 200-1 and returns to the third row 206. The data of the fourth row 208 is read. Similarly, data up to the third row 296 and the fourth row 298 of pages 240 to 100-135 are read. Referring to FIG. 8, the order of reading an image of 1920 * 1080 resolution using the page illustrated in FIG. 4 may be described.

After all the data of one frame is stored in the DDR memory, the next frame is stored in the DDR memory, and the data of the previous frame is output. The direction in which data is output is in the vertical direction, and the COL address increases in the vertical direction in the page shown in FIG. 7, so that the continuous burst mode can be used in the vertical direction.

Since the page 200-1 shown in FIG. 7 has a structure of 8 * 8, the COL address is increased to 0, 1, 2, 3, 4, 5, 6, and 7 without a user's separate command. Output the data. That is, a burst mode with a length of burst mode 8 may be used.

FIG. 9 is a more detailed view of the scan system of FIG. 3 and illustrates a block diagram of a scan system according to another embodiment of the present invention.

The scan system shown in FIG. 9 includes an input unit 10, an input buffer 52, a DDR controller 54, a first DDR memory 57, a second DDR memory 58, and an output unit 80. .

Data is input to the input unit 10, and the DDR controller 52 is connected to the first DDR memory 57 and the second DDR memory 58. The first DDR memory 57 and the second DDR memory 58 are each independent memory means, while data is stored in one of the first and second DDR memories 57, 58, while the data from the other one. Is read (equivalent to 'read'). That is, while the second frame is stored, the data of the first frame is read, and in this way, the first DDR memory 57 and the second DDR memory 58 alternately repeat read / write operations for each frame. do.

The aforementioned DDR controller 54 of the scan system of FIG. 9 reads the first page of the first frame of the input data in the horizontal direction and stores the data in the DDR memory. When the first row of data is input, the data of the first row input is stored in the input buffer 52, and then, when the second row of data is input, using the burst mode to the input buffer 52 The data of the stored first row and the data of the second row are stored together in the first DDR memory 57. That is, data is stored at the COL addresses 0 and 1, 8 and 9, 16 and 17, 24 and 25, 32 and 33, 40 and 41, 49 and 50, 56 and 57 of the first page of the first DDR memory 57. Each is stored at the same time. In this way, data is continuously stored in two memory cells of the same column to store all data of one frame.

Thereafter, a second frame of data is stored, and the process of storing the second frame is the same as the process of storing the first frame. That is, data of the second frame is simultaneously stored in the first column of one page of the second DDR memory 58 and the memory cells of the second column. And while the second frame of data is stored in the second DDR memory 58, the first frame stored in the first DDR memory 57 is read from the first DDR memory 57.

That is, the data of the first frame is output in the same clock period as when the second frame of data is stored. When the DDR controller 54 outputs data from the first DDR memory 57, the output direction of the data is vertical. Since the COL address increases in the vertical direction, the page shown in FIG. 7 can use the continuous burst mode in the vertical direction. In other words, when data is output, data corresponding to COL addresses of 0, 1, 2, 3, 4, 5, 6, and 7 are continuously output using a continuous burst mode in the vertical direction without a user's separate command.

In the above-described embodiment, the case of using an 8 * 8 page having 64 different COL addresses has been described as an example. In order to use the input buffer 52 or the output buffer 56, the number of data bits in one memory cell must be equal to or greater than one pixel data (24 bits in 8-bit RGB). To this end, it is also possible to configure several small bit memory devices in parallel to process data of one pixel.

In addition, the present invention increases the size of the input buffer 52 or the output buffer 54, it is possible to store the data after writing or reading after storing a plurality of rows or columns of data. For example, when using burst mode in the horizontal direction, when reading data from memory, set burst mode to 4, read data from 0-1-2-3 over two clocks, and save. It is also possible to read and store the data in 11 and use it to read the data in the next row. In this way, you can also write data in the same way using burst mode in the vertical direction.

In addition, the present invention can store the data by configuring the size of the input buffer 52 or the output buffer 54 in one row or one column. For example, when using burst mode in the horizontal direction, when reading data from memory, it reads 0-1 data over one clock, then outputs data of 0 and saves data of 1 and outputs all data in one column. It is also possible to output the data of a column. This way, you can also write data in the same way using burst mode in the vertical direction.

Further, the arrangement of the COL addresses of the pages shown in Figs. 4 and 7 need not necessarily be contiguous, and it is possible to arrange in the order of the burst modes available according to the settings of the DDR memory. That is, in the case of DDR memory in which burst mode is set in which data can be automatically accessed in the order of 2-3-0-1, the arrangement of COL addresses increasing in the order of 0-1-2-3 as shown in FIGS. 4 and 7. Rather, COL addresses can be arranged in the order of 2-3-0-1.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and various substitutions, modifications, and changes within the scope without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It will be possible, but such substitutions, changes and the like should be regarded as belonging to the following claims.

As described above, according to the present invention, a system or method for scanning data using DDR, including the input buffer or output buffer, the data of one of the two data stored or output for one clock to the input buffer or output buffer Because it stores, you don't have to access it again to get the same data, so you can process the data at high speed.

Claims (26)

In the data scanning system using DDR, An input unit for receiving the data; First and second DDR memories for storing the data by using a page whose COL address increases in a horizontal direction; When controlling to store the data in the first or second DDR memory and reading the data stored from the first or second DDR memory, and when reading the stored data from the first or second DDR memory, A DDR controller for controlling to simultaneously read data corresponding to the same row from two or more columns of data of the page; An output buffer for storing the data read simultaneously; And And an output unit for outputting the data read by the DDR controller and the data of the remaining rows stored in the output buffer. The method of claim 1, And a burst mode is used when said data is stored in a first or second DDR memory by said DDR controller. The method of claim 1, And a burst mode is used when said data is read from said first or second DDR memory by said DDR controller. The method of claim 1, And the DDR controller controls the output unit to output the data of the remaining rows after outputting the data of the first row. The method of claim 1, The output buffer is a data scanning system using DDR, characterized in that it comprises at least one column. In the data scanning system using DDR, An input unit for receiving the data; An input buffer for storing the received data; First and second DDR memories storing the data by using a page whose COL address increases in a vertical direction; Control to store the data in the first or second DDR memory and control to read the stored data from the first or second DDR memory, and when storing the data in the first or second DDR memory, A DDR controller which controls to simultaneously store data corresponding to the same column in the data of the row stored in the input buffer and the data of the row currently input to the input unit; And And an output unit for outputting the data read by the DDR controller. The method of claim 6, And a burst mode is used when said data is read from said first or second DDR memory by said DDR controller. The method of claim 6, And a burst mode is used when said data is stored in a first or second DDR memory by said DDR controller. The method of claim 6, The DDR controller scans the data of the remaining rows except for the data of the last row before the data of the last row is stored in the first or second memory. system. The method of claim 6, The data scanning system using DDR, characterized in that the input buffer includes at least one row. The method according to claim 2 or 7, The arrangement of the COL address of the page is dependent on the burst mode preset in the DDR memory. The method according to claim 1 or 6, And data bits of memory cells of the first or second DDR memory are larger than one pixel data of the data. The method according to claim 1 or 6, The DDR controller, while controlling the data to be stored in any one of the first DDR memory and the second DDR memory, while controlling to read the data from the other DDR memory using DDR System of scanning data. The method according to claim 1 or 6, The data scanning system using the DDR is a data scanning system using a DDR, characterized in that applied to the display device which is different from the input direction and the output direction of the data. In the data scanning method using DDR, a) receiving data; b) storing the data in the first or second DDR memory using a page whose COL address increases in a horizontal direction; c) data corresponding to the same row in two or more columns of data of said page of said data stored in said first or second DDR memory, said data being read using said page Simultaneously reading; d) storing said data read simultaneously in an output buffer; And and e) outputting data stored in the first or second DDR memory read in step c) and data of the remaining rows stored in step d). The method of claim 15, The step b) is a method of scanning data using DDR, characterized in that using the burst mode. The method of claim 15, And reading the data stored in the first or second DDR memory in step c) uses a burst mode. The method of claim 15, And the data of the remaining columns are output after the data of the first column is output in step e). In the data scanning method using DDR, a) receiving data; b) storing the received data in an input buffer; c) The data is stored in the first or second DDR memory using a page whose COL address increases in a vertical direction, and data corresponding to the same column in the data of the row stored in the input buffer and the data of the currently received row is stored. Storing at the same time; d) reading the data stored in the first or second DDR memory using the page; and e) outputting the data. The method of claim 19, The d) step, the burst scanning method using data, characterized in that using the burst mode. The method of claim 19, The storing of the data in the first or second DDR memory in the step c), using a burst mode, characterized in that the scanning method of the data using DDR. The method of claim 19, And c) storing the data of the remaining rows in the first or second DDR memory before the data of the last row is stored in step c). The method of claim 15 or 19, The arrangement of the COL address of the page is different depending on the burst mode preset in the DDR memory. The method of claim 15 or 19, And data bits of memory cells of the first or second DDR memory are equal to or larger than one pixel data of the data. The method of claim 15 or 19, And storing said data in a first or second DDR memory and reading said data stored in said first or second DDR memory are performed simultaneously. The method of claim 15 or 19, The scanning method using the DDR is applied to a display device which is different from the direction in which data is input in the step a) and the direction in which the data is output in the step e).

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